| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly reliable optical waveguide in which a transmission loss is small and a pulse signal is minimally blunted, and an electronic device including the same. <P>SOLUTION: An optical waveguide 1 comprises a core layer 13. The core layer 13 includes: at least two cladding parts 15; and a core part 14 for transmitting light, which is adjacent to the two cladding parts 15, has an average refractive index higher than that of the cladding part 15, and has a refractive index lowering from a center portion thereof toward the cladding part 15. The core part 14 and the cladding part 15 are formed as follows: A layer including a polyimide-based polymer and a monomer having a refractive index different from the polyimide-based polymer is irradiated with active radiation so as to proceed a reaction of the monomer in an irradiated region. An unreacted portion of the monomer is thus diffused from an unirradiated region to the irradiated region, resulting in causing a difference in refractive index between the irradiated region and the unirradiated region. One of the irradiated region and the unirradiated region is used as the core part 14 and the other is used as the cladding part 15. <P>COPYRIGHT: (C)2012,JPO&INPIT |
